中国科学院数学与系统科学研究院期刊网
AMS
On the Construction of the Conjugate Hull of Brandt Semigroups
Zhang Moucheng, Kan Haibing, Li Yonghua
Acta Mathematica Sinica . 1998, (4): 519 -526 .  DOI: 10.1007/BF02580409